GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of changes in carrying amount of goodwill

The changes in the carrying amount of goodwill for the two years ended December 31, 2021 are as follows:

	Enterprise Software		Appraisal  and Tax		NIC		Total
Balance as of 12/31/2019	$	825,949	$	14,168	$	—	$	840,117
Purchase price adjustments related to CHT acquisition	(1,689)		—		—		(1,689)
Balance as of 12/31/2020	824,260		14,168		—		838,428
Goodwill acquired related to the purchase of NIC	—		—		1,446,868		1,446,868
Goodwill acquired related to the purchase of VendEngine	54,456		—		—		54,456
Goodwill acquired related to other acquisitions	19,922		—		—		19,922
Balance as of 12/31/2021	$	898,638	$	14,168	$	1,446,868	$	2,359,674

Summary of other intangible assets and related accumulated amortization

Other intangible assets and related accumulated amortization consists of the following at December 31:

	2021		2020
Gross carrying amount of other intangibles:
Customer related intangibles	$	949,844	$	322,619
Acquired software	433,800		262,286
Trade names	45,353		22,905
Leases acquired	5,037		5,037
	1,434,034		612,847
Accumulated amortization	(381,541)		(290,779)
Total other intangibles, net	$	1,052,493	$	322,068

Summary of allocation of acquisition intangible assets

The amortization periods of other intangible assets is summarized in the following table:

	December 31, 2021					December 31, 2020
	Gross Carrying Amount		Weighted Average Amortization Period	Accumulated Amortization		Gross Carrying Amount		Weighted Average Amortization Period	Accumulated Amortization
Non-amortizable intangibles:
Goodwill	$	2,359,674	—	$	—	$	838,428	—	$	—
Amortizable intangibles:
Customer related intangibles	$	949,844	21 years	$	157,077	$	322,619	16 years	$	116,609
Acquired software	433,800		7 years	208,451		262,286		7 years	162,378
Trade names	45,353		10 years	13,064		22,905		11 years	9,366
Leases acquired	5,037		9 years	2,949		5,037		9 years	2,426

Summary of estimated annual amortization expense

Estimated annual amortization expense related to capitalized software development costs:

2022	$	3,442
2023	3,285
2024	3,212
2025	2,501
2026	1,339
Thereafter	14,710
	$	28,489

Estimated annual amortization expense related to other intangibles included in the table below:

2022	$	105,244
2023	87,249
2024	86,699
2025	86,016
2026	78,165
Thereafter	609,120
	$	1,052,493